Improvement in safety watch-keys



.Staten Mil 19t-tim PEBLEY LAFLIN, OF WARREN, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND JOHN `J. srnnep'n, on' PROVIDENCE, nnonn' ISLAND.

niunovmmm IN sArETir WATCH-KEYS.

The Schedule referred to in these Letten Patent and making paatof the same.

Know all men by tlwse presents That I, PERLEY LAFLIN, of Warren, in' the county of Worcester, and Commonwealth of Massachusetts, have invented certain new and useful Improvements, in

Watch and Clock-Keys; and I do hereby declare that Y the-following is a full, clear, and exactdescription of the sume, reference being had to the accompanying` drawings, forming a part ofthis specification, in Which- Figure 1 represents a .side View offa key, having my improvements applied thereto;

Figure 2 representsan edge view of g. 1; Figure .3 represents a vertical central section on line A B, g. 2; and y Figure 4 'represents a cross-section on line C D,

g.l 1.. Y l

Tu enable those skilled in the art to which my inventipn belongs, to make and use the same, I will pro-- ceed to describe it more in detail.

The nature of my present invention consists in combining, with the socketor stem-end of the key, a spring and side pieces, for supporting the stem, as shown in the drawings, and in the manner hereinafter described,

so that, when the chain, spring, or Weight, of ati'mekeeping instrument is Wcund up, the spring willl yield,

and thus preventthat sudden strain upon the mechan-l ism of the Watch or.olook,"\yvhich results from the use ofthe common unyielding watch and clock-keys.

The part lettered A is the stem, in which a socket, a, is formed to lit the square end of the ordinary stem or fingerof the watch or clock.

To its upper end is fastened, in this instance, a ilatl spring, B, theupper end of the spring being fastened to lthe head (l, to which the swivel-ring D is secured.

The stemA Ipasses through a hole, b, inthe curved part c, which unites the side piecesEE, the upper edges of vifhich are fastened to the head O. y l l The hole inthe curved part c is madesufficiently largeto permit of the free turningof'the stemi7 While, at the vsame time, the latter is properly -supported by the curved part 0) Y I v From lthe tbregoingf description,V it wllbe seenthrat', when the key is used, 'the'springBwill yield when the' 'watch-spring, o1" chain, and clc'ck-spring, or cord, are Wound up to their full extent, as indicated in red lines, fig'. 4, and allow `the part which is held in the hand to be turned slightly, while the stem A remains stationary, thus preventing the sudden jar or :strain which l .would result to the working-parts of the-watch or clock,

if the part E, held in the hand, were arrested as suddenly as the stem A.

It is a well-known faet that many valuable watches g and clocks are often broken or injured, by the use of the common unyielding` key, whennsed even in ther hands of careful persons, while it is equally Well known, especially to those Whose busines it is to repair watches and clocks, that a great per cent. of the breakages is the result ofa use of the common or unyielding key in the hands of inexperienced or careless persons. v

Having described my improved watch and rclock key1 l and desire to lsecure by Letters Patent, is-

The combination, with the stem A ,andhead C, of

the spring B and side pieces E E, substantially as andf for the purposes set forth; Y

' v PERLEY LAFLLN.

Witnesses:

J. W. OHADSEY, N. B. Onnnsnr.

What I claim therein as new, vand ofmy invention, 

